Middlings-purifier



(No Model.)

3 Shets-Sheet 1. C. S. RIDER.

MIDDLINGS PURIFIER.

Patented Nov. 22,1881.

MMMQW- (No Model.) 3 Sheet$8heet2.

O. S. RIDER.

MIDDLINGS PURIFIER.

No 249,998. Patented Nov. 22,1881.

N. PEYERS. Phuwmha mr. Washington. D4 1;

(No Model.) 3 Sheets-Sheet 3.

G. S. RIDER.

MIDDLINGS PURIPIER.

No. 249,998. Patented Nov. 22,1881.

N. PETERS. Phalo-Lilhognpher, Washingion. D. C-

rrrcn.

ATENT CHARLES S. RIDER, OF CANTON, OHIO.

MlDDLlNGS-PURIFIER.

SPECIFICATION forming part of "Letters Patent No. 249,998, dated November 22, 1881. 7

Application filed February 21, 1881.

To all whom it may concern:

Be it known that 1, CHARLES S. RIDER, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Middlings-Purifiers and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 is a perspective view of the machine. Fig. 2 is a vertical section taken on line 00 :0, Fig. 3. Fig. 3 is, a vertical transverse section on line y y, Fig. 2. Fig. 4 is a topplan view.

The main frame-work of the machine consists of the uprights A A A A the crosspieces B B B B, and the sills G O.

A and A are supplemental uprights, and A A are inclined sills, respectively fastened to the uprights A A and A A Upon the frame a casing is supported, having the side walls, D D, the end walls, E E, and the top or cover F.

G G are vertical walls, supported by the intermediate uprights, A A and arranged to form chambers H H. Within the space between the walls G and G the screen-frame is mounted. This frame is composed of the vertical side walls, I and I, and the cross-pieces P 1 At the bottom of the side walls, I I, are inclined pieces t' t, which rest and reciprocate upon the sills A A the screen-frame being thus supported upon these sills.

The frame is reciprocated by means of a shaft, J, having eccentrics j'j at a suitable distance apart, connected to the screen-frame by links or rods j j. The walls I and I are placed as near as possible to the stationary walls GG.

The screens K K K K K are mounted in the reciprocating frame I I I 1 They are supported upon grooved cleats k, the side pieces of the screen-frame having tongues k, adapted to fit the grooves on the cleats. Each of the said screen-frames can be removed from the machine at any time without the necessity of stopping it if it be working.

(N0 model.)

It is often necessary to remove one or more of the screens for the purpose of cleansing or repairing, and it is impossible to remove any of the screens from machines as heretofore constructed without stopping the whole machine.

When the frames are arranged and sup ported as I have shown any one of them may be taken out and put in order or replaced by another without seriously afiecting the work ing of any of the other screens, as will be more fully appreciated when other matters to be hereinafter set forth are understood. It is often necessary to remove screens for the purpose of replacing them with others having bolting-cloths of different mesh.

In order to keep the mesh of the cloth on the screens properly clear, I combine with each screen the following devices:

k kare cleats secured to the upper faces of the side pieces of the screen-frame.

k k are tubes of rubber fastened at the ends to the cleats k they being stretched to the proper tension.

k k are rubber balls attached to wires or cords k secured to the rubber pipes 70 When the screens are reciprocating rapidly the rubber balls strike continually and bound from the cloth, and the jars that are imparted by them keep the mesh of the cloth suitably clear.

The grooved cleats 7t 7. are at one end supported upon pivots at l, and at the other end they are supported by means of grooved plates L attached to the shaker-frame, and setscrews 1, which pass through slots in said plates and engage with the cleats. The cleats and the screen-frame carried thereby can be raised or lowered at the end where the slotted plates are, and thus the rapidity of the passage of the material over the screen can be regulated.

M M M M M are chutes situated, respectively, beneath the screens. They receive the materials which pass through the screens and conduct them (said materials) back toward one and the same end of the machine. They are long enough to deliver the materials over the ends of the screens that may be below them.

N N N 2 N 3 are chutes situated, respectively, beneath the chutes M M M M and substantiall y parallel thereto.

Each of them is adapted to receive the material which passes over the tail of the screen above and conduct it back to the head of the screen below; hence they are somewhat shorter than the other chutes and the screens.

0 represents one of two upright bars secured to the walls G and G at the head of the shaker-frame. 0 represents oneoftwo similar upright bars attached to said walls at the tail of the shaker-frame.

0 0 0 0 0 are inclined grooves cut in the inner sides of the upright bars 0 O.

P P P P P are guides or sup 'ileinental chutes adapted to fit the inclined groovesjust mentioned. When inserted in said grooves the inner edges of the guides are situated beneath the delivery ends of the upper chutes, M M M M 31, and when the guides are placed parallel all of the materials from said chutes are delivered together into the chamber Q.

0 0 0 0 0 are grooves in the aforesaid up right bars, inclined in directions opposite to the grooves 0 o 0 0 0. The supplemental chutes or guides, or any one or more of them, can be withdrawn from the aforesaid grooves and placed in those last mentioned, and when so placed they return the materials respectively to the next lower screen or screens.

It the middlings obtained from the upper screen be not sufliciently purified, the chute P is placed in grooves 0 0, as shown in dotted lines, Fig. 2, whereupon the middlings from said upper screen will be subjected to the action of the second screen, and a further purification thereof will result. If the action of two screens be not sufficient, the chute P also is inclined inwardly anddownwardly, as shown in dotted lines, so that the middlings shall be acted upon by three screens successively.

p 11 12 19 are inclined grooves in the upright bars 0' O at the tail of the shaker-frame. R R R2 R R are chutes or guides adapted to be seated in said grooves, and when placed therein the tailings from the respective screens are guided to the lower chutes, N N N Nfiabove described.

12 19 1? p are grooves in the upright bars 0 O, inclined opposite to those last described. If one of the guides-for instance, the guide R-be placed in the grooves 12, the material which passes over the end of the corresponding screen will not be returned by the guide to the chute N, but will be thrown into the chamber Q. If the guide It be removed entirely from the machine, the tailings from screen K willfall downwardly until they strike the guide R, which will return them to the third screen, K. It is necessary to do this when both of the upper screens, K and K, are being used for the continuous purification of the fine middlings. If the guides R1 and R be both removed from the machine, then the tailings drop until they strike the guide R, which will return them to the fourth screen, K which must be done when the three upper screens are used for purifying the same mass of middlings.

By the devices now described it will be seen that I provide a perfect control of the material that is being operated upon, and make it possible to use any sieve in the machine for any purpose-that is, either for a further purification of the middlings or for the receiving of tailingsby simply moving one or more of the guides or supplemental chutes. When the parts of the machine are in the ordinary positionsthat is to say, when the guides P P P P P are arranged parallel to throw the middlings all into chamber Q, and when the guides R R R R are, parallel to throw the tailings from screen to screen, and the guide R inclined opposite to the last said guides-the tailings pass from top to bottom of the series and escape finally over the guide R into chamber Q; but, as above said, the tailings can be cut off at any point above the bottom and be thrown immediately into said chamber Q.

S S are cross-pieces, permanently fastened to the outside of the upright bars 0 O, for the purpose of insuring the proper separation of The end wall, E, is provided with one or more doors, g, which permit access to the chamber Q and to the supplemental chutes at that end of the shaker. The end wall, E, is also provided with doors q, to-permit access to the chamber Q. The tailings are guided from the chamber Q by inclines s to an orifice, s, whence they may be carried by a conveyor or other device. The middlings are collected from chamber Q by inclines s, which guide them to exits 8 where they may be delivered to a conveyor or elevator.

T T are air-passages communicating, respectively, with the spaces beneath the screens and with the chamber H.

T T are air-passages communicating, respectively, with the spaces above the screens and with the chamber H.

U represents a blast-fan, preferably situated above the machine, and arranged to force air downward into the chamber H, and thence into the spaces below the air-screens, through the passages T. U is a suction-fan, also sitnated, by preference, above the machine, and adapted to exhaust the air from chamber H, and from the spaces above the screens, through the orifices T.

The passage of the air through the orifices T and T is controlled by means of hinged valves or doors V V, arranged to close said orifices more or less.

The valves or doors are provided with cranks or handles 4) v on the outside of the machine, by which the operator can readily adjust them in position.

By these devices I provide a ready control of the passage of the air through each screen entirely independent of the other screens, it

being often necessary to have a strong blast at one point in the machine and a lighter blast or lighter blasts at other points.

The middlin gs are fed to the machine through the spouts W W, which may be of any preferred character.

Power is imparted to the shaft J from the counter-shaft W, which engages therewith by means of friction-wheels a u, there being a coiled spring, W arranged to hold said wheels in firm engagement.

What I claim is- 1. The combination, with the sieves K and K and the middlings-board M, which delivers all the material passing through sieve K at a point beyond the head of sieve K, of the adjustable chute l, which receives material from said middlings-board, and which is adapted interchangeably to guide said material to sieve K and to guide it out of the machine, whereby a further sieving of them is prevented, substantially as set forth.

2. The combination, with the sieves K, K, and K and the middlings-board M, of the adjustable and removable chutes P and P, whereby the middlings from the first sieve may be taken directly from the machine, and whereby said middlings may be guided below the second sieve to the third, substantially as set forth.

3. The combination, with the sieves K and K, the board beneath sieve K, and arranged to deliver the middlings beyond the head of sieve K, and the chute N, which carries the tailin gs back to a point beneath the head of the sieve K, of the adjustable chute R, adapted to interchangeably throw the tailings out from the machine and to guide them to the chute N, substantially as set forth.

4. The combination, with the sieves K K K the chutes M and M, respectively beneath the sieves K and K, and adapted to deliver the middlin gs beyond the head ends of said sieves, and the chutes N and N, respectively arranged to deliver the tailings to sieves K and K, of the adjustable and removable chutes R and R, whereby the tailings from sieve K can be guided to either of the lower sieves or guided out of the machine at will, substantially as set forth.

5. The combination of the screens arranged in a series, the chutes which deliver the middlings beyond the heads of the screens, the chutes which respectively carry the tailings from one screen back to the head of the next to form a continuous stream of material throughout the series, the upper orifices, T, and lower orifices, T, in the sides of the screen-chamber, arranged to pass the air from one side of said chamber to the other and up through the screens, whereby interference of the air-currents with the material passingfrom one screen to the next is prevented.

6. The combination of the following elements, namely: the sieves arranged in a series in a central chamber, the chutes which guide the middlings out from said chamber at several points, the chutes which return the tailings to the heads of the lower screens, the end chamber into which the middlings are guided atany desired point, the opposite end chamber into which the tailings may be guided at any desired point, the air-orifices T, below the screens, the tight side chamber, H, to convey an air-blast to the central chamber, the orifices T above the screens, and the tight chamber H, for withdrawing the air from the central chamber, substantially as set forth.

7. The combination, with the sieves, of the rubber pipes K and the balls K substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES S. RIDER.

Witnesses:

S. P. WOLGOTT, S. T. WILLIAMS. 

